print(bignum_add("999999999999999999999999999999999999999999999999999999999999999999999999999999999999999", "1111111111111111111111111111111111111111111111111111111111111")+"\n");

print(bignum_sub("999999999999999999999999999999999999999999999999999999999999999999999999999999999999999", "1111111111111111111111111111111111111111111111111111111111111")+"\n");

print(bignum_mul("999999999999999999999999999999999999999999999999999999999999999999999999999999999999999", "1111111111111111111111111111111111111111111111111111111111111")+"\n");

print(bignum_div("999999999999999999999999999999999999999999999999999999999999999999999999999999999999999", "1111111111111111111111111111111111111111111111111111111111111")+"\n");

print(bignum_mod("999999999999999999999999999999999999999999999999999999999999999999999999999999999999999", "1111111111111111111111111111111111111111111111111111111111111")+"\n");